USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
6
Manual Air Relief Shown Open
In Locked Position
STARTING THE PUMP and FILTER SYSTEM
WARNING
Before Starting the Pump
1.
Use ONLY Hayward clamp system components; DEX2421JKIT clamp system, DEX2421J2 nut/bolt assembly, DEX2422Z2
metal reinforced seal. Non-Hayward clamp components may fail in use and cause explosive component separation.
Verify that upper and lower filter bodies are properly secured with the filter body clamp. Never rely on hand tightening
the clamp nut to the clamp bolt. Using a ¾” socket on a torque wrench, torque clamp nut to clamp bolt to 150 inch-lbs.
Verify that the filter manual air relief body is in the LOCK position, and no filter components are missing, damaged or
not genuine Hayward components. (See Fig 2)
2.
Close filter drain. Note: Filter plug requires an o-ring seal. (See Fig 4)
3.
Open all system valves to allow water from the pool to the filtration system and from the filter to return to the pool.
4.
Place the manual air relief valve in OPEN position. (See Fig 2)
Starting Pump
1.
When starting system pump, do not stand over or near filter. If water leakage appears at filter tank clamp, immediately
turn off all system circulation pumps and all electrical power. Do not return to the filter until all water leakage has
stopped.
Reassemble the clamp system per the instructions on page 7 in this owner’s manual to stop leak.
2.
Return to filter to CLOSE manual air relief valve only when a steady stream of water (not air or, air and water mix) is
discharged from the manual air relief valve.
3.
To avoid damages to the filter elements, DO NOT operate the filter for more than a minute or two without the D.E. pre-
coat.
Pre-Coating
Add the correct amount of D.E. (see specifications on the previous page of this manual or on the filter label) into the
system through the skimmer – as fast as the plumbing will take it. Record the pressure gauge reading after the D.E. has
been added. This is the “pre-coat” or “clean” pressure.
OPERATION
WARNING
FILTERING
Filtration starts as soon as the filter has been pre-coated. As the filter removes dirt
from the pool water, the accumulated dirt causes a resistance to flow. As a result,
the gauge pressure will rise and the flow will decrease. When the pressure rises 8-
10 psi (.55-.69 bar) above the pre-coat pressure, it is time to backwash (clean) the
filter. Once your filter is running and there is a pressure reading, line up the green
arrow with the current reading. (See Fig 3) When the pressure rises to or above the
red or second arrow, it is time to clean your filter.
Note: During initial clean-up of the pool, particularly with a new pool or a very dirty
pool, it may be necessary to backwash more frequently due to the heavy initial dirt
load in the water.
CLAMP NUT
CLAMP BOLT
Figure 1
Figure 2
Figure 3
Tighten clamp bolt
and nut using a
torque wrench to
150 inch-lbs.
